Add train and test volumes
Add nose tests for watershed function
Rename tests/data to tests/example-data
Add tests for agglomeration and fix found bugs
Add data required for test-agglo.py
Add tests for feature managers and computation
Merge pull request #17 from jni/testing

Add nose tests and example dataset
Add nose requirement and PIP requirements.txt
Merge pull request #18 from jni/requirements

Add nose requirement and PIP requirements.txt